N&PD Moderators: Skorpio Forums Media, Science and Research Neuroscience and Pharmacology Discussion Why do codeine and hydrocodone have the same formula but different highs? JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. You are using an out of date browser. It may not display this or other websites correctly.You should upgrade or use an alternative browser. Members who reacted to message #9 All (2) Like (2) Aug 4, 2020 4meSM Bluelighter · From Wasp spray Messages 3,185 Reaction score 1,946 Points 270 Aug 3, 2020 Rectify Bluelighter Messages 11,866 Reaction score 2,405 Points 420 Loading… Forums Media, Science and Research Neuroscience and Pharmacology Discussion Why do codeine and hydrocodone have the same formula but different highs?